Just played a new Portal mod, I must say it is rather good!
https://www.moddb.com/mods/factum-solus
It is planned to be released in episodes with the new episode out soon. Enjoy everyone! 
looks cool, well mapped out too.
My favourite is the raising and lowering floors.
PS - I had no idea you lived within 10 miles of me! :fffuuu:
The guy who made this gave me tips for my first attempt at mapping for source! :awesome:
Not that I ever finished it or anything.
[EDIT: Whoops, wrong guy. Never mind.]